I have. So I finally finished a script to calculate it and display it rather nicely. This is a tree where the center is the origin point, it branches out based on rolls (only black lines) or based on choices (some lines red, some black). Choices can be to reroll 2 dice, 1 dice or none at all.
For Keyan with 1 Bomber Command Center: Average damage is 2.84, versus 2.5 without BCC (only a 13% increase, booo). But it's still interesting to see what to reroll. Basically on the Keyan reroll (which is first) you reroll everything that's not a Hit + Crit.
Also interesting is the B-wing with 2 Bomber Command Centers, which gives it a 35% increase in average damage (2.37 vs. 1.35). On the first reroll, you reroll black hits *unless there's an accuracy*. This is of course situational, because if you want to maximize damage and the opponent will use a brace (think 2 HP left on the ship) the best choice is different.
Both were rather intuitive, but what can I say, I like graphs. Hopefully I'll get more math results out of this script.





